#!/usr/bin/env node
// 导入 Circle 类  
const Circle = require('./04-export-object');  
  
// 创建一个 Circle 实例  
const circle = new Circle(5);  
  
console.log(`\u001b[32mDiameter: ${circle.diameter}\u001b[0m`);  
console.log(`\u001b[32mArea: ${circle.area.toFixed(2)}\u001b[0m`);  
console.log(`\u001b[32mCircumference: ${circle.circumference.toFixed(2)}\u001b[0m`);  
 